Support for underground telegraph-lines



(No Model.) Q 3 SheetsSheet 1.

T. B. ATTERBURY.

SUPPORT FOR UNDERGROUND TELEGRAPH LINES. No. 258,210. Patented May 23,1882.

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" 3 Sheets-Sheet 2.

T. B. ATTERBURY.

SUPPORT FOR UNDERGROUND TELEGRAPH LINES.

(No Model.)

Patented May 23, 1882 Jl! forn ey (No Model.) 3 Sheets-Sheet 3.

T. B. ATTERBURY.

SUPPORT FOR UNDERGROUND TELEGRAPH LINES.

No. 258.210. Patented May 23, 1882.

Attorney N. PETERS PhnkmLvlhcgmplu-r. \Vaahmglmh D c UNITED STATES THOMAS B. ATTERBURY, or

PATENT OFFICE.

PITTSBURG, PENNSYLVANIA.

SUPPORT FOR UNDERGROUND TELEGRAPH-LINES.

SPECIFICATION forming part of Letters Patent No. 258,210, dated May 23, 1882.

' Application filed November 19, 188l.

To all whom it may concern:

Be it known that I, THOMAS B. ATTERBURY, a citizen of the United States, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Supports for Underground Telegraph-Lines; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

My invention relates to the construction of insulating-conductors for underground electrical wires.

Referring to the drawings, Figure 1 is a perspective view of trough or casing for receiving the wire-holders and wires, with lid removed. Fig. 2 is a sectional view ofFig. 1 with the wireholders in position and the lid or cover thereon. Figs. 3 and 4 are cross-sectional views, showing the wire-holders as applied or used in circular tubes. Fig. 5 is a detached view, in perspective, of the wire-holder shown in Fig. 2. Fig. 6 is a longitudinal sectional view, showing the recess in the pipes for receiving the wireholders. Figs. 7 and 8 are longitudinal sectional views of the pipes with the wire-holders shown in Fig. 2 therein, and the wires represented as passing above and below the holders. Figs. 9 and 9 are top and side views of my preferred form of wire-holder or detachable insulator. Figs. 10 and 10 are top and side views of the next adjoining holder or section. Fig. 11 is a side view of a series of holders in position.

A designates a tube, casing, or trough of terra-cotta, glass, or other vitreous material, and is provided with a top or cover, B,which rests on top of the side walls of the tube or trough A, in recesses or on shoulders prepared for that purpose, and affords easy access to the interior of the casin g when it is necessary to insert additional wires or when repairs are needed.

The bottom of the tube or trough A is provided with a depression or gutter, b, which serves to collect and carry away any waterwhich may have found its way to the interior of the tube or trough, from whence it is con- (No model.)

veyed by pipes to sewers, as shown in dotted lines. I do not, however, limit myself to this form of tube or casing for holding the sectional detachable wire-holders, as other forms may answer equally well.

(J indicates the sectional detachable wireholders, made by preference of glass; but other non-metallic non-conducting vitreous material may be used. I prefer glass, however, for the reason that it'is one of the bestinsulating mate rials known, and is more susceptible of being manipulated or worked into a uniform product. The wire-holders O are provided with wings or lateral projections c at their ends, which serve to retain them in place when inserted in the casing, and thus render them self-sustainin g. The wire-holders are also provided with diagonal grooves 61 d on their upper edges to receive and hold the wires. The object of making the grooves diagonal is that in laying the wires therein they will have to be slightly sprung in order to insert them in the grooves. This will cause an impingement of the wires on the ends of the grooves and prevent the wires from slipping or sagging. I may, however, make the grooves straight without departing from the spirit of my invention.

The grooves cl are made nearer the ends of the holder, in both the upper and lower surfaces or edges of the holder, than the grooves 61 as shown in Figs. 9 and 10, while the intermediate grooves, d, are made at uniform distanees apart.

It will be apparent that by reversing the ends of the holders, or by simply turning them over as they are inserted or stacked up in the trough or casing, the grooves or openings will be at different points, as shown in Fig. 11, so that the wires in the next adjacent section will not lie directly above each other.

WVhen the holders are made with the grooves in the upper surface or edge only it will be necessary to reverse them or turn them end for end; but where both edges are provided with the grooves all that is necessary is to turn the holders or reverse the edges alternately as they are placed in position. By this arrangement, should the wires sag or become otherwise displaeed they will not fall or impinge on the wires below them to disturb or interfere with the electrical currents.

In Figs. 3, 4, 7, and S I have shown the sectional wire-holders as adapted to be used in circular pipes or tubes, and where circular pipes or tubes are used I make the same with an enlarged portion at the inner end of the bell-mouth, as shown at a, or at any other convenient or desirable point, into which the wire-holders are inserted one above the other, and are held from lateral displacement by the shoulders e and the abutting end of the next section of pipe. When the circular pipe is used I prefer to make each section in two parts or longitudinally divide them into an upper and lower part, so that easy access may be had to the wires, asis fully shown and described in my Patent No; 220,954, of October 28, 1879.

In Fig. 4 I have shown the holders with separating-lugsf, which hold the sections a short distance apart, and I form grooves on the upper and lower edges thereof for holding or receiving the wires. In using this modified form of holder the wires are passed over the top of one of the sections and under the lower edge of the next adjacent section, as shown in Figs. 7 and S. This has a tendency to stretch the wires and prevent undue vibration.

The essential feature of thisinvention is that by using the sectional wire-holders and the divided pipe, iasing, or trough access can be had to any particular wire for repairs or new wires readily introduced.

At convenient or desirable intervals along the line man-holes can be built up, so as to provide access to the interior of the pipes or tubes, so that with a testing-machine a broken or damaged wire can be readily determined and repairs promptly and intelligently made.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, 1s

As a new article of manufacture, a sectional wire-holder for insulating underground telegraph-wires, made of glass or other vitreous material, provided with grooves on each side and in reverse order, and with laterally-projecting wings at each end, as set forth.

In testimony whereof I aflix my signature in presence of two witnesses.

THOMAS B. ATTERBUILY.

Witnesses:

DANL. P. BERG, J uLIUs S'IENGEL, 

